xdp-tutorial

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XDP TX and hardware CRC offload

1

Is there any way to use NIC's CRC offload when sending packets via XDP TX?

cyanide-burnout

I have Ubuntu:20.04 based Docker environment where I am going over tutorial. I have installed all required tools. While going over basic02 module, I tried using “testenv.sh setup” which failed...

ashguptablr

In commit "dcdc6836f237c8a1a36b2d699c171475a7c4d07e" with branch "origin/master", the following compilation error would occur like that: > In file included from xdp_prog_kern.c:8: ./../common/parsing_helpers.h:156:28: error: unused function 'parse_icmp6hdr' [-Werror,-Wunused-function] static __always_inline int parse_icmp6hdr(struct...

imgrass

Currently the `-g` flag is set everywhere during building. This can cause a BTF issue [1] if the source file referenced in the BTF section cannot be found at clang...

simonhf

How distributable are XDP userland binaries and kernel bpf binaries?

1

The XDP tutorial setup dependencies [1] say: > For now, this tutorial depends on kernel headers package provided by your distro. We may choose to shadow some of these later....

simonhf

fix bug: offset is outside of the packet.

1

1. xdp_loader: ./xdp_loader --dev lo -S --progsec xdp_packet_parser verb 2. Problem Description: libbpf: load bpf program failed: Permission denied libbpf: -- BEGIN DUMP LOG --- libbpf: 0: (bf) r6 =...

weiyanhua100

AF_XDP zero copy - Operation not supported error

2

Hi, I am trying to enable AF_XDP zero copy mode and i see the error in Cent OS 8(kernel 4.18), but SKB mode and DRV mode with copy works fine....

sadsiddi

basic04-pinning-maps: correct solution for assignment 2?

3

Thanks so much for such an incredible resource! I've been working through the assignments and I was trying to understand how the provided solution implements what the prompt requires for...

alexeldeib

basic01-xdp-pass: xdp_pass_kern.c:3:10: fatal error: 'bpf/bpf_helpers.h' file not found

1

hi I installed the last version of BPF but when I run clang I get this error message, which means I don't have this include. How is it gotten?

efjcz

advanced03-AF_XDP: How to explain this packet loss?

16

After experiencing AF_XDP packet loss myself, and reading about others experiencing packet loss too [1], I tried to reproduce the packet loss with barely modified XDP tutorial code. Below I...

simonhf